package uk.ac.ebi.intenz.webapp.controller.modification;
   
   import org.apache.log4j.Logger;
   import org.apache.struts.action.ActionForm;
   import org.apache.struts.action.ActionForward;
   import org.apache.struts.action.ActionMapping;
   
   import uk.ac.ebi.intenz.mapper.AuditPackageMapper;
   import uk.ac.ebi.intenz.mapper.EventPackageMapper;
  import uk.ac.ebi.intenz.mapper.HistoryEventMapper;
  import uk.ac.ebi.intenz.webapp.dtos.EcSearchForm;
  import uk.ac.ebi.intenz.webapp.dtos.EnzymeDTO;
  import uk.ac.ebi.intenz.webapp.utilities.EntryLockSingleton;
  import uk.ac.ebi.intenz.webapp.utilities.UnitOfWork;
  import uk.ac.ebi.intenz.webapp.exceptions.DeregisterException;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.sql.Connection;
  import java.sql.SQLException;
  
  /**
   * This Action ...
   *
   * @author Michael Darsow
   * @version $Revision: 1.3 $ $Date: 2008/11/17 17:14:10 $
   */
  public class DeleteEntryUpdateAction extends CurationAction {
    private static final Logger LOGGER =
  	  Logger.getLogger(DeleteEntryUpdateAction.class.getName());
    private final static String SEARCH_BY_EC_ACTION_FWD = "searchEc";
  
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
                                 HttpServletResponse response) throws Exception {
      // Do standard checks in the parent's execute method.
      ActionForward forward = super.execute(mapping, form, request, response);
      if (forward != null) return forward;
  
      EnzymeDTO enzymeDTO = (EnzymeDTO) form;
      Long enzymeId = new Long(enzymeDTO.getId());
      Connection con = (Connection) request.getSession().getAttribute("connection");
      EntryLockSingleton els = (EntryLockSingleton) request.getSession().getServletContext().getAttribute("entryLock");
      UnitOfWork unitOfWork = (UnitOfWork) request.getSession().getAttribute("uow");
      try {
        // Set the standard remark in the audit tables.
        AuditPackageMapper auditPackageMapper = new AuditPackageMapper();
        auditPackageMapper.setRemark(AuditPackageMapper.STANDARD_REMARK, con);
  
        // Commit
        LOGGER.info("Committing form data.");
        unitOfWork.commit(enzymeDTO, con);
        LOGGER.info("Data subimtted");
  
        if (!enzymeDTO.isActive()){
      	  // Modifying an already deleted entry, just its event note:
      	  HistoryEventMapper hem = new HistoryEventMapper();
      	  hem.updateEventNote(Integer.valueOf(enzymeDTO.getLatestHistoryEventId()),
      			  Integer.valueOf(enzymeDTO.getLatestHistoryEventGroupId()),
      			  enzymeDTO.getLatestHistoryEventNote(), con);
        } else {
            // Update event.
            EventPackageMapper eventPackageMapper = new EventPackageMapper();
            eventPackageMapper.updateFutureDeletionEvent(Integer.parseInt(enzymeDTO.getLatestHistoryEventGroupId()),
                    Integer.parseInt(enzymeDTO.getLatestHistoryEventId()), enzymeDTO.getLatestHistoryEventNote(),
                    enzymeDTO.getStatusCode(), con);
        }
        con.commit();
  
        LOGGER.info("Delete event updated.");
      } catch (SQLException e) {
          con.rollback();
          throw e;
      } catch (DeregisterException e) {
        LOGGER.error(e.getMessage());
        // Create standard error message (see 'struts_config.xml').
        throw e;
      } finally { // release lock
        els.releaseLock(enzymeId.toString());
        LOGGER.info("Lock of EC " + enzymeDTO.getEc() + " (ID: " + enzymeId + ") released.");
      }
  
      // Forward to 'searchEc' Action to show both entries.
      EcSearchForm ecSearchForm = new EcSearchForm();
      ecSearchForm.setEc(enzymeDTO.getEc());
      request.setAttribute("ecSearchForm", ecSearchForm);
      return mapping.findForward(SEARCH_BY_EC_ACTION_FWD);
    }
  
  }